STK16C88-WF35I Cypress Semiconductor Corp, STK16C88-WF35I Datasheet

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STK16C88-WF35I

Manufacturer Part Number
STK16C88-WF35I
Description
Manufacturer
Cypress Semiconductor Corp
Datasheet

Specifications of STK16C88-WF35I

Lead Free Status / Rohs Status
Compliant
Cypress Semiconductor Corporation
Document Number: 001-50595 Rev. *A
Features
Logic Block Diagram
25 ns and 45 ns access times
Directly replaces battery-backed SRAM modules such as
Dallas/Maxim DS1230 AB
Automatic nonvolatile STORE on power loss
Nonvolatile STORE under Software control
Automatic RECALL to SRAM on power up
Unlimited Read/Write endurance
Unlimited RECALL cycles
1,000,000 STORE cycles
100 year data retention
Single 5V+10% power supply
Commercial and Industrial Temperatures
28-pin (600 mil) PDIP package
RoHS compliance
198 Champion Court
256 Kbit (32K x 8) AutoStore+ nvSRAM
Functional Description
The Cypress STK16C88 is a 256 Kb fast static RAM with a
nonvolatile element in each memory cell. The embedded
nonvolatile elements incorporate QuantumTrap technology
producing the world’s most reliable nonvolatile memory. The
SRAM provides unlimited read and write cycles, while
independent, nonvolatile data resides in the highly reliable
QuantumTrap cell. Data transfers from the SRAM to the
nonvolatile elements (the STORE operation) takes place
automatically at power down. On power up, data is restored to
the SRAM (the RECALL operation) from the nonvolatile
memory. Both the STORE and RECALL operations are also
available under software control.
San Jose
,
CA 95134-1709
Revised December 11, 2009
STK16C88
408-943-2600
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Related parts for STK16C88-WF35I

STK16C88-WF35I Summary of contents

Page 1

... Document Number: 001-50595 Rev. *A 256 Kbit (32K x 8) AutoStore+ nvSRAM Functional Description The Cypress STK16C88 is a 256 Kb fast static RAM with a nonvolatile element in each memory cell. The embedded nonvolatile elements incorporate QuantumTrap technology producing the world’s most reliable nonvolatile memory. The ...

Page 2

... Thermal Resistance............................................................. 8 AC Test Conditions ............................................................. 8 AC Switching Characteristics ............................................ 9 Switching Waveforms ......................................................... 9 AutoStore or Power Up RECALL ..................................... 11 Software Controlled STORE/RECALL Cycle................... 12 Part Numbering Nomenclature (Commercial and Industrial) ............................................. 13 Ordering Information......................................................... 13 Package Diagrams............................................................. 14 Sales, Solutions and Legal Information .......................... 15 Worldwide Sales and Design Support .......................... 15 Products ....................................................................... 15 STK16C88 Page [+] Feedback ...

Page 3

... Deasserting OE HIGH causes the I/O pins to tristate. V Ground Ground for the Device. The device is connected to ground of the system Power Supply Power Supply Inputs to the Device. CC Document Number: 001-50595 Rev. *A Figure 1. Pin Diagram - 28-Pin PDIP Description STK16C88 Page [+] Feedback ...

Page 4

... V CC RECALL cycle is automatically initiated and takes t complete. Document Number: 001-50595 Rev the STK16C88 WRITE state at the end of power up RECALL, the SRAM data is corrupted. To help avoid this situation Kohm resistor is connected either between WE and system V CC ...

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... STORE CAP SWITCH operations and SRAM WRITEs are inhibited. Noise Considerations The STK16C88 is a high speed memory. It must have a high frequency bypass capacitor of approximately 0.1 µF connected between V and V using leads and traces that are as short CC SS, as possible ...

Page 6

... L H Notes 1. The six consecutive addresses must be in the order listed. WE must be high during all six consecutive CE controlled cycles to enable a nonvolatile cycle. 2. While there are 15 addresses on the STK16C88, only the lower 14 are used to control software modes. Document Number: 001-50595 Rev – A ...

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... All other inputs cycling – 0.2V). All others V < 0.2V or > Max, V < V < Max, V < V < > – Description STK16C88 ....................................–0.5V to Vcc + 0.5V 0-7 Ambient Temperature V CC 0°C to +70°C 4.5V to 5.5V -40°C to +85°C 4.5V to 5.5V Min Max Unit Commercial Industrial 100 ...

Page 8

... MHz 3 [4] Test Conditions Test conditions follow standard test methods and proce- dures for measuring thermal impedance, per EIA / JESD51. Figure 4. AC Test Loads R1 480Ω 5. 255Ω STK16C88 Max Unit 28-PDIP Unit °C/W TBD °C/W TBD Page [+] Feedback ...

Page 9

... WE must be HIGH during SRAM Read Cycles and LOW during SRAM WRITE cycles. 6. I/O state assumes CE and OE < V and WE > Measured ±200 mV from steady state output voltage. Document Number: 001-50595 Rev. *A Description ; device is continuously selected. IH STK16C88 Unit Min Max Min Max 25 ...

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... Address Setup to End of Write Address Setup to Start of Write Address Hold After End of Write Write Enable to Output Disable Output Active After End of Write SCE PWE t SD DATA VALID t HZWE HIGH IMPEDANCE SCE PWE t SD DATA VALID HIGH IMPEDANCE STK16C88 Unit Min Max Min Max ...

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... Low Voltage Reset Level RESET V Low Voltage Trigger Level SWITCH Switching Waveforms Note 10. t starts from the time V rises above V HRECALL CC Document Number: 001-50595 Rev. *A Description Figure 9. AutoStore/Power Up RECALL . SWITCH STK16C88 STK16C88 Unit Min Max μs 550 10 ms 500 ns 3.6 V 4.0 4.5 V Page [+] Feedback ...

Page 12

... The software sequence is clocked on the falling edge of CE without involving OE (double clocking aborts the sequence). 12. The six consecutive addresses must be read in the order listed in the Mode Selection table. WE must be HIGH during all six consecutive cycles. Document Number: 001-50595 Rev. *A [11, 12 Description Min DATA VALID STK16C88 45 ns Unit Max Min Max μ [12 STORE RECALL HIGH IMPEDANCE ...

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... Part Numbering Nomenclature (Commercial and Industrial) STK16C88 - Ordering Information These parts are not recommended for new designs. They are in production to support ongoing production programs only. Speed Ordering Code (ns) 25 STK16C88-WF25 STK16C88-WF25I 45 STK16C88-WF45 STK16C88-WF45I All parts are Pb-free. The above table contains Final information. Please contact your local Cypress sales representative for availability of these parts Document Number: 001-50595 Rev ...

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... Package Diagrams Document Number: 001-50595 Rev. *A Figure 11. 28-Pin (600 Mil) PDIP (51-85017) STK16C88 51-85017- *C Page [+] Feedback ...

Page 15

... Document History Page Document Title: STK16C88 256 Kbit (32K x 8) AutoStore+ nvSRAM Document Number: 001-50595 Orig. of Rev. ECN No. Change ** 2625096 GVCH/PYRS *A 2826441 GVCH Sales, Solutions and Legal Information Worldwide Sales and Design Support Cypress maintains a worldwide network of offices, solution centers, manufacturer’s representatives, and distributors. To find the office closest to you, visit us at cypress ...

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